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A Novel SnO2 Sensor and its Selectivity Improvement with Catalytic Filter

Abstract : We present a new organometallic approach for the preparation of nanostructured SnO2 gas sensitive layer. The deposited sensitive layer on a silicon device shows high response to 100 ppm of CO and C3H8. In order to improve the sensor selectivity we have implemented a catalytic filter material in a cap placed just above the sensing device. The catalytic filter is made of zinc oxide supported gold nanoparticles (Au@ZnO) prepared by deposition-precipitation by urea (DPU) method. This catalytic filter, operated at room temperature and under humid atmosphere (HR 50%), allowed to selectively eliminate the sensor response under 100 ppm of CO, whereas the sensor always responds to 100 ppm of C3H8.
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Justyna Jońca, Katia Fajerwerg, Myrtil L. Kahn, Andrey Ryzhikov, Loïc Joanny, et al.. A Novel SnO2 Sensor and its Selectivity Improvement with Catalytic Filter. Eurosensors 2014, Sep 2014, Brescia, Italy. pp.923-926, ⟨10.1016/j.proeng.2014.11.306⟩. ⟨hal-02023256⟩



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